This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Hi Jerry-
We kind of did this- our archives are paper records rather than books-- but we placed a data logger in the middle of one of the boxes of records and recorded the freeze cycle. We also recorded the air in the truck with two additional data loggers (a PEM and a HOBO) to compare to the internal record box temperature, which I think may be as close as we can get to knowing the temperature of the paper. It was very interesting and I think we will do a few more tests using full and half full boxes in our chest freezers. - Fascinating- Dana On Sun, Mar 11, 2012 at 10:03 AM, Jerry Shiner <i...@keepsafe.ca> wrote: > This is a message from the Museumpests List. > To post to this list send it as an email to pestlist@museumpests.net > To unsubscribe please look at the footer of this email. > ----------------------------------------------------------- > Hi > > I've been watching this string with interest. Of course, I'm a microclimate > guy, so I immediately look for the definable microclimates in the treated > material. In this case, you have the freezer, the boxes, and the interior of > the books- each is somewhat isolated /insulated from the conditions outside, > and should be monitored. > Without monitoring (live or via data logger), you don't know what conditions > are in the objects in treatment. > > I suggest you consider a facsimile artefact for monitoring,in this case, a > book of similar binding and paper to those being treated. For a related > example, when heat treating furniture, it is common to provide a piece of > lumber of a similar type and shape as the largest piece of furniture to be > treated (say a table or piano leg). The theory is that heat will penetrate > the facsimile at a similar rate to the real furniture leg, BUT- you can > safely drill a hole into the centre of the lumber facsimile, insert a > thermocouple, and plug it with putty and monitor the temperature. The heat > treatment is then controlled by monitoring the thermocouple temperature (and > adjusting humidity to prevent drying of the artefacts) > > Why not use a disposable book, cut out a void for a wireless or wired temp > transmitter, and place the facsimile book amongst your treatment books in > the freezer? You could save energy and gain confidence by monitoring the > actual temperature, and sustaining for an appropriate time. Knowing the > facsimile object's internal temperature would even be helpful to avoid > removing books from their bags before they have reached an appropriate > temperature (to avoid condensation). I suspect that in this situation,only > the box would need to be bagged. > > I'm not sure how well a battery operated residential transmitter unit would > work in a freezer, but I expect this would be adequate (and cheap). If > anyone has, or will use this method, please let me know for my microclimate > classes > > thanks > js > > > Jerry Shiner > Keepsafe Microclimate Systems > www.keepsafe.ca i...@keepsafe.ca > +1 800 683 4696 > > > > ---------------------------------------------------------------------- > To send an email to the list, send your msg to pestlist@museumpests.Net > > To unsubscribe from this list send an email to pestlist@museumpests.net and > in the subject put: > "unsubscribe" - no quotes please. > > You are receiving the Pestlist emails in standard mode. > To change to the DIGEST mode send an email to imail...@museumpests.net with > this command in the body: > > set mode digest pestlist > > Any problems email l...@collectionpests.com or l...@zaks.com > ---------------------------------------------------------------------- To send an email to the list, send your msg to pestlist@museumpests.Net To unsubscribe from this list send an email to pestlist@museumpests.net and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to imail...@museumpests.net with this command in the body: set mode digest pestlist Any problems email l...@collectionpests.com or l...@zaks.com
